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Filtering by: Creator Mahrt, Larry J. Remove constraint Creator: Mahrt, Larry J. Decade 2000-2009 Remove constraint Decade: 2000-2009

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  • Observational studies of stable nocturnal boundary layers: intermittent turbulence, sensible heat budgets and observational errors

    Creator:
    Nakamura, Reina
    Abstract:
    Atmospheric boundary layers become stably stratified at night over land when the surface becomes colder than the air layer above. In stable nocturnal boundary layers (SNBL), turbulence becomes weak and intermittent, terrain-induced phenomena such as drainage currents or gravity-waves emerge and the surface heterogeneity is enhanced. Because of their complexity...
    Resource Type:
    Dissertation
    Full Text:
    Observational Errors. Abstract approved: Larry Mahrt Atmospheric boundary layers become stably stratified at

  • A conditional analysis method applied to globally intermittent turbulence

    Creator:
    Klipp, Cheryl L.
    Abstract:
    Globally intermittent turbulence is characterized by sudden switching from significant turbulence to weak turbulence and back on time scales ranging from seconds to tens of minutes as opposed to microscale intermittency, which is due to organization of small scale gradients by individual eddies on scales as small as the Kolmogorov...
    Resource Type:
    Dissertation
    Full Text:
    Applied to Globally Intermittent Turbulence. Abstract approved: Larry Mahrt Globally intermittent

  • Flow over surface discontinuities in a marine environment

    Creator:
    Moore, Erin M.
    Abstract:
    This study concentrates on analysis of LongEZ aircraft data taken offshore of the Atlantic Coast of the United States. Due to the land structure of the region, it was possible to isolate the effect of narrow land on air as it flows offshore. The narrow land (Outer Banks) separates inland...
    Resource Type:
    Masters Thesis
    Full Text:
    Discontinuities in a Marine Environment. Abstract approved: Larry Mahrt This study concentrates on analysis of

  • Comparison of heat and moisture fluxes from a modified soil-plant-atmosphere model with observations from BOREAS

    Creator:
    Lee, Young-Hee and Mahrt, Larry
    Abstract:
    This study evaluates the prediction of heat and moisture fluxes from a new land surface scheme with eddy correlation data collected at the old aspen site during the Boreal Ecosystem-Atmosphere Study (BOREAS) in 1994. The model used in this study couples a multilayer vegetation model with a soil model. Inclusion...
    Resource Type:
    Article
    Full Text:
    . Mahrt, L. (1998), Flux sampling errors for aircraft and towers, J. Atmos. Oceanic Technol., 15, 416–429

  • Evaluation of the air-sea bulk formula and sea-surface temperature variability from observations

    Creator:
    Vickers, Dean and Mahrt, Larry
    Abstract:
    Eddy‐correlation fluxes are compared to air‐sea fluxes predicted by a widely used bulk flux formulation without wave‐state effects. Systematic discrepancies are found. For example, the model approximately equates the roughness lengths for heat and moisture; however, the observed roughness length for heat (zoh) exceeds that for moisture (zoq) by an...
    Resource Type:
    Article
    Full Text:
    acceleration of the low-level wind over warm pools is discussed. Citation: Vickers, D., and L. Mahrt (2006

  • Vertically integrated sensible-heat budgets for stable nocturnal boundary layers

    Creator:
    Nakamura, Reina and Mahrt, Larry
    Abstract:
    The stable nocturnal boundary layer is commonly viewed or modelled as a balance between the temperature tendency (cooling) and vertical heat-flux divergence. Sometimes the radiative-flux divergence is also included. This perspective has dictated the design of field experiments for investigating stable nocturnal boundary layers. Tower-based micrometeorological data from three field...
    Resource Type:
    Article
    Full Text:
    -scale of turbulence fluctuations φ Arbitrary variable REFERENCES André, J. C. and Mahrt, L. 1982 The

  • Moisture fluxes over snow with and without protruding vegetation

    Creator:
    Mahrt, Larry and Vickers, D.
    Abstract:
    The sublimation of snow and evaporation of melted snow is contrasted between brush, grass and bare ground sites using eddy-correlation data. Averaged over the entire winter season, the evaporation/sublimation is about 20% greater over the brush site than the bare ground site, apparently due to greater supply of snow. Blowing...
    Resource Type:
    Article
    Full Text:
    Q. J. R. Meteorol. Soc. (2005), 131, pp. 1251–1270 doi: 10.1256/qj.04.66 Moisture fluxes over snow

  • Along-shore variations of offshore flow

    Creator:
    Moore, Erin and Mahrt, Larry
    Abstract:
    Using eddy correlation data collected by the LongEZ research aircraft, the adjustment of atmospheric flow downstream from a coastline is examined. Along-shore variation of the turbulence over the water is generated by the varying width of the upstream land strip between the sea and inland water. Over the coastal zone,...
    Resource Type:
    Article
    Full Text:
    surface fluxes, J. Atmos. Ocea- nic Technol., 11, 1018–1025, 1994. Sun, J., D. Vandemark, L. Mahrt, D

  • Flux-gradient relationship, self-correlation and intermittency in the stable boundary layer

    Creator:
    Klipp, Cheryl L. and Mahrt, Larry
    Abstract:
    The correlation between dimensionless shear ϕₘ and dimensionless height z/L, where L is the Obukhov length, for stable conditions is strongly influenced by self‐correlation for the present datasets. This effect is quite large for stronger stability but still significant for near‐neutral conditions. A conditional analysis of nocturnal stable boundary‐layer data,...
    Resource Type:
    Article
    Full Text:
    L. KLIPP and LARRY MAHRT∗ Oregon State University, Corvallis, USA (Received 21 August 2003; revised

  • A modeling study of katabatic flows

    Creator:
    Smith, Craig M.
    Abstract:
    A modeling study is undertaken to better understand the physics of katabatic flows. This study is divided into three topics; a comparison between a large eddy simulation (LES) and a mesoscale model of katabatic flows, a sensitivity study of katabatic flows to various physical parameters, and an investigation into the...
    Resource Type:
    Masters Thesis
    Full Text:
    . Larry Mahrt, and Dr. Douglas Markle, for their comments on this research as well. I would like to